Classification of Living Organisms Flashcards
Who developed the system for classifying living things?
Linnaeus developed the system.
What is the broadest category in the classification system?
Domain is the broadest category.
What is the most specific category in the classification system?
Species is the most specific category.
What are the seven taxonomic groups from broadest to most specific?
Kingdom, phylum, class, order, family, genus, species.
Do the taxonomic groups overlap with one another?
No
What mnemonic helps remember the taxonomic groups?
Dear King Phillip Came Over For Good Soup.
Why was the binomial system introduced?
To avoid confusion caused by local and colloquial names for the same organism.
What is the binomial system?
A two-name system used to name organisms.
What are the two parts of a binomial name?
The genus name and the species name.
Why is the binomial system useful?
It provides a universal, standardised way to name organisms.
What invention allowed scientists to see inside cells?
The microscope.
How did seeing inside cells help classification?
It allowed scientists to understand internal cell structure.
What else improved classification?
A better understanding of biochemical processes.
What was the result of these advancements?
Scientists proposed new and better ways of classifying organisms.
Who proposed the three-domain system?
Carl Woese.
What evidence supported the three-domain system?
Chemical analysis.
What is the broadest category of classification?
Domain.
What are the three domains?
Archaea, Bacteria, and Eukaryota.
What are Archaea?
Primitive bacteria usually living in extreme environments.
What are Bacteria?
True bacteria.
What are included in Eukaryota?
Protists, fungi, animals and plants.
What do evolutionary trees show?
The relationships between organisms over time.
What do branch points represent in evolutionary trees?
Where one species develops into two new species (speciation).
What does a recent branch point indicate?
The two species share a recent common ancestor and are closely related.
